A user enters a username and numbers (how many user & pass to create) in an HTML form.

The code uses the submitted username and adds a serial from "1" to limit (submitted number).

Example input:

submitted user is john

submitted numbers is 20

Example result:

john1, john2... john20

In the future when the user requests another 10 user & pass with same name "john" the number will start from 21 (john21, john22... john30)
adding another series is not done yet any help and tips are welcome.